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Table of n, a(n) for n=1..28.
Cf. A000577, A006534, A030223, A030224.
Sequence in context: A073799 A040016 A145519 * A114624 A091024 A275289
Adjacent sequences: A030221 A030222 A030223 * A030225 A030226 A030227
David W. Wilson
More terms from Joseph Myers, Sep 24 2002